Water-tube boiler



with the carriage support, constitutes the case shift frame on which thecarriage is supported for bodily movement therewith fore and aft of themachine. The forward end of each plate 37 is pivoted, as at 38, to adepending link 39, pivoted at its upper end on a pivot pin 40 thatprojects inwardly from the associated side plate 2 of the frame.

- In this manner thecase shift frame is supported at its forward end bythe parallel links 39 and is supported at its rear end by the parallelarms 34.

Not only is the carriage shiftable with the case shift frame, but amongother devices that are also shiftable with said frame are the feed rack41, the margin and line-lock stops 42, the dog rocker 43, the universalbar 44, the frame to which the universal bar is connected, the ribbonvibrator 46, its actuating arm 46 the ribbon spools 47, the ribbon feedmechanism including the ratchet wheel 48, the ribbon feed pawl 49, itsactuating arm 50, the actuating arm 51 for the dog rocker, the rack 52for the back spacer, and the back spacer actuating rod 53.

The case shift frame may be shifted by any suitable means, those showncomprising a shifting lever 54 to which a link 55 is connected. Theupper end of said link is pivoted to a bell crank lever 56, pivoted at57 (see Fig. 4) on a stud projecting from the left-hand side plate 2 ofthe frame, and held in place thereon by a screw 58. A depending arm 59on its bell crank lever co-acts with the projection on the shift frameto shift it rearwardly to the upper case position. position by asliiftlock key 60 that controls a shift lock member 60 mounted on the front ofthe comb plate 6.

The space key 61 has its supporting levers 61 f-ulcrumedon the combplatefi and ex tending rearwardly and down therefrom and connecting attheir lower ends with a squared crossbar 62. This bar carries an arm 63operatively connected with a link 64 pivoted at its lower end to anactuating arm which forms part of the dog rocker.

It will be seen, therefore, thatevery working part of the machine iscarried by the inner frame, and that the construction is such that allof said parts may be assembled,

mounted in place, and adjusted in said frame while it is detached fromthe outer frame. The inner frame with the parts mounted thereon may thenbe introduced into the outer frame as a single unit without dismantlingany part of the machine, and without having had occasion to handle ormar the outer frame until the inner frame with the working partsthereon, is to be placed in position therein and the machine as a wholeis ready to be delivered as a finished product.

The outer frame is preferably made of thin sheet metal such as steel andis very The parts may be locked in shifted light since the strain on themachine is borne in the main by the inner frame. The main purpose of theouter frame is to cover many of the working parts and the unfinishedinner frame, and impart to the machine a finished appearance andoutline. Although the outer frame is light in weight, it adds,nevertheless, as a strengthening factor to the machine as a whole whensecured in place with the top plate added. These parts tend tostrengthen and render more rigid the inner frame, and the machine as awhole, as will hereinafter appear. The outer frame, which is shown indetail in Fig. 1 and designated as a'whole by the reference numeral 65,is made of two separate members welded together along the base at bothsides and at the front, to form in effect one part. The lower member isformed from a single piece of metal of rectangular formation, as viewedfrom above, with an inwardly directed flange 66 joined to an upwardlyextending surrounding wall 67. ach front, back and side wall of thismember is therefore angular, or substantially L-shaped in cross section.The inwardly extending flange 66is apertured at its four corners toreceive rubber feet 68, as fully disclosed in the hereinbefore mentionedapplication Sr. No. 469,458, and by which the machine is supported onits base board. The other member of the frame section is formed from acontinuous piece of sheet metal with a front cross piece or wall 69 andside walls 70- The body port-ion of each side wall has a rearwardlyextending portion 70 near its lower edge corresponding substantially tothe projections 21 on the inner frame and, like the latter, forming anL-shaped or angular recess through which the carriage may travel.Beginning at the top edge 70*, and at or about the point where the combplate 6 of the inner frame issituated when the parts are assembled, eachside plate 70 slopes downwardly and forwardly at 71 to the front wall69. An inte ral, inwardly turned flange, beading or rib 72 is formed oneach inclined edge and continues along the upper edge of the wall 69.This flange gives a finish to the frame and strengthens and renders itmore rigid. In order that the side walls of the outer frame may bearagainst the outer sides of the plates 2 of the inner frame at the pointswhere the two frames are secured together, I prefer to form integral,inwardly extending bearing lugs'73 and 74 on the side walls 70 and 67,respectively, of the outer frame members, thus maintaining the sideWalls of the inner and outer frame sections spaced apart except at thepoints where they are rigidly connected together, as indicated in Fig.2.

The flange 66. where it extends across the machine at the front thereof,carries a sheet metal bracket 75, fixed thereto at 76. This May 15,1923. 1,455,521 7 o. E. G. CLARKE WATER TUBE BOILER Filed March 13 19 183 Sheets-Sheet 2 INVENTOR ATTORNEYS.

May 15, 1923. 1,455,521

D. E. G. CLARKE WATER TUBE BOILER Filed March 13 1918 3 Sheets-Sheet 5INVENTOR flay/1126761776? ATTOPNEYS Patented May 15, 1923.

UETE

' -I AVID E. G. CLARKE, or BAYONN NEW JERSEY.

WATERrTUBE BOILER.

Application filed March 18, 1918. Serial No. 2 22,073.

To all whomz't may concern: a 1

Be it known that I, DAVID E. G. CLARKE, .of Bayonne, in the county ofHudson and in a certain ,new and useful Improvement in a VVater-TubeBoiler, and do hereby declare that the following is a full, clear, andexact description thereof.

My invention relates to a water tube boiler and has for its object toprovide a steam generating apparatus constructed of stand ardized unitsadapted to be assembled to produce any desired horsepower and which "ischaracterized by simplicity of construction and ease of erection. v

'A'further object of my invention is to provide a steam generatingapparatus constructed of assembled units the number of which can beincreased without increasing materially the diameter of the steam andwater drum.

A further object of my invention is to provide a steam generatingapparatus which requires a minimum amount of head room.

A further object of my invention is to;

provide a steam generating apparatus in which the tubes are easy ofaccess forreplacement and cleaning. r

Other and further objects of my invention will be apparent from thefollowing description of one embodiment thereof as illustrated in theaccompanying drawings, in whichv 1 Figure 1 is a view partly in frontelevation and partly in section;

Figure 2 a section on line 2-2 of Figure 1 looking in the direction ofthe arrows; and

Figures 3 and 4: views similar to the righthand portion of Figure 1 andillustrating modifications.

Similar reference characters refer to similar parts throughout thedrawings.

The embodiment of my invention chosen for purposes of illustration is ofthe type illustrated in United States Letters Patent to Morrin No.950,296 granted February 22, 1910, for asteamboiler and in United StatesLetters Patent to Hoxie No. 1,102,407 granted July 7, 1914, for a watertube boiler.

vention is not limited to the type of apparatus disclosed by thesepatents. Thus, the invention may be embodied in a single bank or banksof units, or'in any other desired the State of New Jersey, have inventedIt will be understood, however, that the in-- type of steam producingapparatus, instead of in the inverted construction type illus trated.

power of the apparatus illustrated inthe abov'e mentioned patentsfit isnecessary to increase the diameter of the steam and water drum in orderto accommodate the necessary additional tubes. Such structures,

therefore, practically have to be made to' order as standardization ofparts is diflicult if not impossible. In my invention, the

in stock, and a 'steamproducing apparatus It willbe noted that toincrease'the'horseparts can be standardized, inadeand kept of anydesired horsepower readily'an'd quickly constructed by assembling anydesired number of units or sections' The diameter'of the steam and waterdrumfneed not be changed for" apparatus developing different horsepower,asit is'necessary only to add to the depth, number, or other di mensionsof the tube units, as may be most convenient. struction. The headers,for example, have straight sides and may be standardized and kept instock. The diameter ofthe tubes l kewise may be standardized and keptinstock; When a boiler is desired, it is "neces sary only tocut the tubesthe desired length and expand them in the headers, or the completesections or units may be made up and kept ready for assembling.

Referring tothe drawings, a unit, or sec i 2 tion consists of an upperheader indicated by reference character-La lower header 2, and tubes 3which are expanded or otherwise inserted inthe headers. The tubes may beeither curved or straight. The headers preferably arelongitudinallyextending boxes with straight sides and substantiallysquare in cross section. The shape and dimensions may be varied ifdesired. Any desired number of units or sections may be-assembled togive any'required horsepower. The water The parts are simple inconandsteam drum 5 preferably runs substantially at right angles to theheaders, which:

are connected to the drum in any desired manneras by nipples 4. Withthis con-- struction it is not necessary for the steam and water drum tobe entirely above the,

headers, or of the top of thetubes as is the case in the patentsreferred to above, thus saving head room. A similar result may beobtained bysuitable connections even though the steam andwater drum runsparallel with the headers, but the form illustrated is a convenient andspace-economizing type. A down comer or circulating tube 6 connects drum5 with bottom header 2, A mud drum 7 with blow valve 8 maybe providedfor removing sediment from bottom headers 2, the drum being connectedtherewith in any desired manner as by nipples 9.

It is preferable to have baffies 10 to insure a thorough circulation ofthe hot gases among the tubes. Hand holes 11 are rovided in upperheaders 1 and hand holes 12 in lower headers '2 in order to provide easyaccess to the tube ends.

A suitable steam ofltake pipe may be pro vided in the apparatus such asthat indicated by the element 13. i I

Figures 3 and 4: represent modifications.

Figure 3 illustrates a modification in which the sections or units areall of the same length,but the headers all are in the same plane insteadof in parallel planes as illus trated in Figure 1. In this constructionthe means connecting the upper headers with the water and steam drum 5will vary in length as illustrated by the varying lengths of nipples 4.In Figure 4, the lower headers are all in the same plane, but thesections vary in length so that thecenter of each upper header is at thesame height with respect to the water and steam drum.

7 Many modifications of my invention will.

be apparent to those skilled in the art, my

- invention not being limited to the particular embodimentthereof'chosen for purposes of illustration, but consisting of a watertube boiler made in sections adapted tobe stand ardized for rapidassembling.

upper headers but so arranged that straight lines. drawn betweencorresponding upper and lower headers will form a series of inverted Vsto provide a space for the heating medium, downcomers connected to said.

drum below its water level and tosaid lowerheaders, and a plurality'oftubes connecting corresponding upper and lower headers to formtherewitha complete separable unit, whereby the heating medium will passfrom theinverted V formed by said tubes through. i

said tubes and heat the water therein so that it will circulate fromsaid tubes through their upper headers, the drum, the downcomers, thelower headers, and again into the tubes. 7 v

'2. The structure specified in claim.lin which baffles are interposedbetween the tubes to cause the heating medium to follow a tortuouspassage thereth'rough whereby the heating medium efiiciency.

In testimony that I claim the foregoing I have here-unto set hand. ,I

' DAVIDE, G. CLARKE.

is v utilized with great

